Envelope sealing machine



Aug. 8, 1933. E. E. GRAY ENVELOPE SEALING MACHINE Filed Oct. 29, 1931 E lma? E. 51 111 IHvEMfclr Patented Aug. 8, 1933 anna ENVELOPE SEALING MACHINE Elmer E. Gray, Saugus, Mass. Application October 29, 1931. Serial No. 571,839

8 Claims.

This invention relates to improvements for envelope sealing machines, and more particularly to that part of the machine which positions the flap of the envelope for moistening prior to the actual sealing.

It has for purposes to provide a simplified movable weigt of the roller type adaptable for the purpose of furnishing adequate pressure of the envelope flap against the moistening means; to minimize friction against the flap during the moistening process; to provide a moistening mechanism, the upper portion of which is designed to function with minimum friction on its normal bearings during the moistening process, to the end that as the flap of the envelope is inserted beneath the roller member, said roller is raised from its normal hearing contacts out of friction therewith and revolves upon said flap without weight upon sai normal bearings; to provide improved means for furnishing a minimum resistance to the action or a mechanism adaptable for envelope moistennig, rendering its action unrestrained, unimpeded, unfettered, and disencumbered; to provide a means adaptable to furnish a uniform and even pressure against all the gummed portion of an envelope fiap as said fiap passes thereunder; to provide an improved mounting for the moistening means, mounting adaptable to allow a uniform and even pressure of the means against all the gummed portion of an envelope flap as said flap is passed thereunder; to furnish a moistening means and mounting adaptable to adequately and evenly function over the gummed portion or" an envelope throughout its angular course or otherwise, to actually and effectively accomplish this irrespective of the thickness or stiffness of the envelope; to provide a novel mounting positioned above the moistening means and adaptable to allow the required free and unobstructed movement and functioning of the mechanism during the moistening process; to provide a moistening means embodying in its production less material r than heretofore required; to reduce manufacturing costs; to minimize service requirements; and to provide the various other advantages and results made evident from the following specification.

Referring to the accompanying drawing which forms a part of this specification, and in which similar letters of reference refer to similar parts throughout the various views, Figure 1 shows a top view of the moistening mechanism mounted upon an envelope sealing machine, a portion of which is shown. Figure 2 shows an end view of the mechanism, Figure 3 shows a front view, and Figure 4 shows an envelope with its flap in position passing through the device during the moistening process.

Referring again to the drawing, A shows the liquid container from which moisture is transmitted through the channel B to the basin C in which the moisture transmitting roller D revolves. The pressure roller E is mounted in the loose bearings F on the holding bracket .G which bracket is in turn loosely mounted upon the supporting arm H by the rivet/I. J shows the envelope flap.

As the envelope flaps, one at a time, pass between the rollers D and E, the weight of the 'roller E upon and against the. flap causes both rollers to rotate and the liquid in the basin 0 is transmitted to the gummed portion of the flap by the roller D. a

While I have illustrated and described a preferred construction for carrying my invention into effect, this is capable of variation or inodification without departing from the spirit of the invention. I therefore'do not wish to be limited to the exact details of construction herein set forth but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent of the United States of America:-

1. In a device of the kind described, a movable weight comprising a roller mounted in loose bearingsupon a holding bracket, said bracket in turn loosely mounted upon a supporting arm and adaptable to furnish a uniform and even pressure against the gummed portion of an envelope flap as said flap passes thereunder.

2. An enveloping moistening mechanism embodying means. for applying moisture on the gummed side of an envelope flap and additional means adaptable to press the envelope flap against said first mentioned means, said' additional means comprising a roller, loosely mounted in bearings upon a holding bracket, said bracket in turn loosely mounted upon a supporting arm.'

3. In a device of the kind described, a supporting arm, a holding bracket loosely mounted thereon, and a roller mounted on said holding bracket in loose bearings.

4. In a device of the kind described, a supporting arm, a holding bracket loosely mounted thereroller loosely mounted in said bearings.

5. An envelope moistening mechanism embodying means for applying moisture on the gummed side of an envelope flap, additional means adaptable to press the envelope flap against said first mentioned means, said additional means comprising a roller so mounted in bearings upon a holding bracket that as said flap is inserted and passed thereunder said roller is raised from its normal hearing contact, out of friction therewith, :and revolves upon said flap without weight upon said normal bearings, said bracket in turn loosely mounted upon a supporting arm.

6. In a device of the kind described, a supporting arm, a holding bracket, and a movable weight comprising a roller mounted in loose bearings upon said holding bracket, said bracket in turn loosely mounted upon said supporting arm and adaptable to furnish a uniform and even pressure against the gummed portion of an envelope flap-as said flap passes thereunder.

bracket, said bracket in turn loosely mounted upon said supporting arm and adaptable to furnish a uniform and even pressure against the gummed portion of an envelope flap as said flap passes thereunder.

ELMER E. GRAY. 

